Quarterly report pursuant to Section 13 or 15(d)

Stock Option Plans (Additional Information) (Detail)

v3.5.0.2
Stock Option Plans (Additional Information) (Detail) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Exercisable Options Outstanding Shares 518,054  
Weighted average exercise price per share $ 5.02  
Unvested Options Outstanding, Shares 480,712  
Unvested Options Outstanding, Weighted average exercise price $ 4.07  
Unvested Options Outstanding Weighted average remaining life (yrs) 7 years 1 month 6 days  
Weighted average remaining contractual term on unvested options 7 years 2 months 12 days  
Unrecognized stock compensation expense $ 1,874,254  
Weighted average recognition period 1 year 9 months 18 days  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 7 years 1 month 6 days 7 years 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 3,461,296